AlN-W复合陶瓷的微波损耗研究  

MICRAWAVE LOSS TANGENT OF AlN-W COMPOSITE CERAMICS

作　　者：王江源[1] 贾贤[1] 贾成厂[1] 董桂霞[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]河北理工大学,唐山063000

出　　处：《粉末冶金工业》2012年第1期43-47,共5页Powder Metallurgy Industry

基　　金：中俄合作项目(2010DFR50360)

摘　　要：以AlN和W粉为原料,采用放电等离子烧结技术,在1 400～1 700℃、30MPa的工艺条件下制备了AlN-W复合陶瓷。采用扫描电镜、能谱分析仪、安捷伦精密阻抗分析仪4284A等对复合陶瓷的微观组织、介电常数、微波损耗进行了表征,研究了影响复合陶瓷微波损耗性能的因素。结果表明,AlN粉末颗粒细小、烧结保温时间增加,有利于提高复合陶瓷对微波的损耗;W含量增加不一定有利于微波损耗值的提高,而复合陶瓷中W颗粒的数目是影响微波损耗值的关键因素。AlN-W composite ceramics were prepared by spark plasma sintering at 1 400 1 700℃ under pressure of 50 MPa using the AlN and W powder as raw materials. The microstructure, dielectric constant and loss tangent of the ceramics were characterized by scanning electron microscopy, energy disperse spectroscopy and Agilent 4284A. And the factors of effecting loss tangent of AlN-W composite ceramics has been studied. The results show that the smaller AlN particles size and the longer sintering time, the higher loss tangent. The increase of W content is not benificial to the improvement of loss tangent of the composite ceramics. W particle number in the composite ceamics is the key factor of affecting loss tangent.

关 键 词：氮化铝 钨 介电常数 损耗正切 

分 类 号：TQ174.13[化学工程—陶瓷工业]